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POWR
CYLINDERS
SERVICE POINTS
Cylinder inspection
1. Eliminate:
Carbon deposits
(with a rounded scraper 1)
2. Inspect:
Cylinder water jacket
Corrosion/mineral deposits → Clean
or replace.
Cylinder inner surface
Score marks → Replace.
3. Measure:
Cylinder bore "D"
(with a cylinder gauge)
Out of specification → Replace cylin-
der and piston as a set.
NOTE:
Measure the cylinder bore in parallel and at
a right angle to the crankshaft. Then, aver-
age the measurements.
Standard
80.000 ~
Cylinder
80.018 mm
bore "D"
(3.1496 ~
3.1503 in)
Taper "T"
Out of
round "R"
D = Maximum (D
T = (Maximum D
or D
)
6
R = (Maximum D
D
, D
or D
2
4
5-26
Limit
Original cylinder
bore + 0.04 mm
(0.0016 in)
0.08 mm
—
(0.003 in)
0.05 mm
—
(0.002 in)
~ D
)
1
6
or D
) – (Maximum D
1
2
, D
or D
) – (Minimum
1
3
5
)
6
E
5
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